以下是基于音调发生器的解决方案,看起来很稳定,使用DialogFragment中的ontouch监听器。在OnViewCreated方法中为每个按钮设置onTouchListeners,然后使用以下ontouch监听器方法,在触摸按钮时连续播放所选的DTMF音调,当按钮不再被触摸时停止播放。AnswerDialogListener是回调到MainActivity的回调函数。
编辑:我尝试通过使用toneType = ToneGenerator.TONE_DTMF_0;而不是toneType = toneGenerator.TONE_DTMF_0;来修复编译器警告,结果破坏了之前正常工作的DTMF音调RFC2833输出。
private View.OnTouchListener myTouchListener = new View.OnTouchListener(){
public boolean onTouch(View v, MotionEvent event) {
String callidText = callid;
AnswerDialogListener listener = (AnswerDialogListener) getActivity();
int streamType = AudioManager.STREAM_MUSIC;
int volume = 50;
if(event.getAction() == MotionEvent.ACTION_DOWN) {
switch (v.getId()) {
case R.id.answer_dialog_0_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad0");
toneType = toneGenerator.TONE_DTMF_0;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_1_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad1");
toneType = toneGenerator.TONE_DTMF_1;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_2_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad2");
toneType = toneGenerator.TONE_DTMF_2;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_3_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad3");
toneType = toneGenerator.TONE_DTMF_3;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_4_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad4");
toneType = toneGenerator.TONE_DTMF_4;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_5_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad5");
toneType = toneGenerator.TONE_DTMF_5;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_6_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad6");
toneType = toneGenerator.TONE_DTMF_6;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_7_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad7");
toneType = toneGenerator.TONE_DTMF_7;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_8_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad8");
toneType = toneGenerator.TONE_DTMF_8;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_9_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "Keypad9");
toneType = toneGenerator.TONE_DTMF_9;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_asterisk_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "KeypadAsterisk");
toneType = toneGenerator.TONE_DTMF_S;
toneGenerator.startTone(toneType);
return true;
case R.id.answer_dialog_hash_button:
toneGenerator = new ToneGenerator(streamType, volume);
toneGenerator.getAudioSessionId();
listener.onAnswerResponse(callidText, "KeypadHash");
toneType = toneGenerator.TONE_DTMF_P;
toneGenerator.startTone(toneType);
return true;
}
}
if(event.getAction() == MotionEvent.ACTION_UP) {
switch (v.getId()) {
case R.id.answer_dialog_0_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_1_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_2_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_3_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_4_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_5_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_6_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_7_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_8_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_9_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_asterisk_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
case R.id.answer_dialog_hash_button:
toneGenerator.stopTone();
toneGenerator.release();
return true;
}
}
return false;
}
};
以下是在MainActivity回调处理程序中的if语句片段,用于输出活动SIP呼叫上的DTMF:
if (response.equals("Keypad0")) {
try {
if (call != null) {
call.sendDtmf(0);
}
} catch (Exception e) {
e.printStackTrace();
}
} else if (response.equals("Keypad1")) {
try {
if (call != null) {
call.sendDtmf(1);
}
} catch (Exception e) {
e.printStackTrace();
}
}